/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */
package controller;

import DAO.Util.CauHoiDAO;
import java.io.*;
import javax.servlet.*;
import java.util.ArrayList;
import javax.xml.*;
import org.w3c.dom.*;
import org.xml.sax.SAXException;
import Pojo.*;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerConfigurationException;
import javax.xml.transform.TransformerException;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.dom.DOMSource;
import javax.xml.transform.stream.StreamResult;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.servlet.ServletException;

/**
 *
 * @author ducquyen
 */
@WebServlet(name = "CapNhatCauHoicontroller", urlPatterns = {"/CapNhatCauHoicontroller"})
public class CapNhatCauHoicontroller extends HttpServlet {

    /**
     * Processes requests for both HTTP
     * <code>GET</code> and
     * <code>POST</code> methods.
     *
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    protected void processRequest(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException, ParserConfigurationException, SAXException, TransformerConfigurationException, TransformerException {
        response.setContentType("text/html;charset=UTF-8");
        request.setCharacterEncoding("UTF-8");
        PrintWriter out = response.getWriter();
        try {
            /*
             * TODO output your page here. You may use following sample code.
             */
            String action = request.getParameter("Action");
            if (action != null) {
                if (action.equals("View")) {
                    int maCauHoi = Integer.parseInt(request.getParameter("MaCauHoi"));

                    DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
                    DocumentBuilder builder = factory.newDocumentBuilder();
                    Document doc = builder.parse(CauHoiDAO.layDuongDanTapTinCauHoi());

                    CauHoi ch = new CauHoi();
                    ch = CauHoiDAO.layCauHoiTheoMaCauHoi(doc, maCauHoi);
                    
                    HttpSession session = request.getSession(true);
                    session.setAttribute("CapNhatCauHoi",ch);
                    
                    request.getRequestDispatcher("/CapNhatCauHoi.jsp").forward(request, response);

                }
                if (action.equals("CapNhat")) {
                    CauHoi ch = new CauHoi();
                    ch.setMaCauHoi(Integer.parseInt(request.getParameter("maCauHoi")));
                    ch.setNoiDungCauHoi(request.getParameter("noiDungCauHoi"));
                    ch.setLuaChon1(request.getParameter("luaChon1"));
                    ch.setLuaChon2(request.getParameter("luaChon2"));
                    ch.setLuaChon3(request.getParameter("luaChon3"));
                    ch.setLuaChon4(request.getParameter("luaChon4"));
                    ch.setDoKho(Integer.parseInt(request.getParameter("doKhoDe")));
                    ch.setCauDung(Integer.parseInt(request.getParameter("cauTraLoi")));


                    DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
                    DocumentBuilder builder = factory.newDocumentBuilder();
                    Document doc = builder.parse(CauHoiDAO.layDuongDanTapTinCauHoi());
                    CauHoiDAO.capNhatCauHoi(doc, ch);
                    HttpSession session = request.getSession(true);
                    session.setAttribute("CapNhatCauHoi",ch);
                    session.setAttribute("CapNhatCauHoiThanhCong",1);
                    request.getRequestDispatcher("/CapNhatCauHoi.jsp").forward(request, response);
                    

                }
            }
        } finally {
            out.close();
        }
    }

    
// <editor-fold defaultstate="collapsed" desc="HttpServlet methods. Click on the + sign on the left to edit the code.">

    /**
     * Handles the HTTP
     * <code>GET</code> method.
     *
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        try {
            try {
                processRequest(request, response);
            } catch (TransformerConfigurationException ex) {
                Logger.getLogger(CapNhatCauHoicontroller.class.getName()).log(Level.SEVERE, null, ex);
            } catch (TransformerException ex) {
                Logger.getLogger(CapNhatCauHoicontroller.class.getName()).log(Level.SEVERE, null, ex);
            }
        } catch (ParserConfigurationException ex) {
            Logger.getLogger(CapNhatCauHoicontroller.class.getName()).log(Level.SEVERE, null, ex);
        } catch (SAXException ex) {
            Logger.getLogger(CapNhatCauHoicontroller.class.getName()).log(Level.SEVERE, null, ex);
        }
    }

    /**
     * Handles the HTTP
     * <code>POST</code> method.
     *
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doPost(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        try {
            try {
                processRequest(request, response);
            } catch (TransformerConfigurationException ex) {
                Logger.getLogger(CapNhatCauHoicontroller.class.getName()).log(Level.SEVERE, null, ex);
            } catch (TransformerException ex) {
                Logger.getLogger(CapNhatCauHoicontroller.class.getName()).log(Level.SEVERE, null, ex);
            }
        } catch (ParserConfigurationException ex) {
            Logger.getLogger(CapNhatCauHoicontroller.class.getName()).log(Level.SEVERE, null, ex);
        } catch (SAXException ex) {
            Logger.getLogger(CapNhatCauHoicontroller.class.getName()).log(Level.SEVERE, null, ex);
        }
    }

    /**
     * Returns a short description of the servlet.
     *
     * @return a String containing servlet description
     */
    @Override
    public String getServletInfo() {
        return "Short description";
    }// </editor-fold>
}
